Once you sign in to your Bing account, you will be transferred to a new page that is your Bing Dashboard. There, click on ADD YOUR SITE.

You will be redirected to a new page, in which you will be asked for your Website's URL and Sitemap.The URL is the address of the website (domain name) and the Sitemap of the website is your full website list.

To find your Sitemap: in the Editor, click on Pages. Locate your Home page and click on the Gear Icon next to it and select SEO.

To find your Website URL: in the Editor, click on Domain, you'll see URL link under Your Existing Domain.

Copy both the Website URL and the Sitemap and paste the links, then click ADD.

Bing will then ask you to verify your website using one of the 3 methods they have. To verify your SITE123 website, you need to select and copy the HTML Tag and use the code which you'll need to insert in the necessary section on your website.

Go to your website Editor, click on Settings and select Plugins and Custom Codes. Click on Manage then on +Add New Plugin, and add Bing Webmaster Tools.

In the Application ID field, you will need to add the code snippet from the HTML Tag you got from Bing Webmaster Tools. Insert the code, Enable it, and click Save.

Publish your website to update it with the changes you've made.

Once you Publish your website, go back to Bing Webmaster Tools and click VERIFY for the HTML Tag.

Once you verify and everything is correct, you will be redirected to the new Dashboard of your Bing Webmaster Console. This will complete the verification of your website with Bing Webmaster Tools.